JPH0733087Y2 - Freezing prevention device in bath equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an antifreezing device for a bath device, which enables remote reheating of water or hot water in a bathtub by circulation by a pump.

[Conventional technology]

2. Description of the Related Art A bath kettle is widely put into practical use in which water is supplied from a bath kettle with a water heater to a bathtub and when the temperature of the hot water in the bathtub decreases, water or hot water in the bathtub can be remotely heated by circulation by a pump. In this type of instrument, a heater is provided at a required position in the instrument, and when a thermoswitch detects a decrease in temperature, the heater is energized to prevent freezing in the instrument.

The above-mentioned conventional anti-freezing device can prevent freezing in the device, but cannot prevent freezing in the pipe between the device and the bath. For this reason, especially in a bath device having a long pipe in which equipment is installed outdoors, water in the pipe may be frozen.

Further, as another conventional technique, in JP-A-62-217045, when driving a pump to prevent freezing, the water level sensor detects the water level in the bathtub and the water level required to drive the pump. There is disclosed a technique in which when the water level is not satisfied, the valve is opened to supply water to the bathtub, and when the required water level is reached, the valve is closed to drive the pump.

According to this conventional technique, it is possible to prevent freezing in the piping, but this conventional technique can be applied only to a device capable of directly detecting the water level in a bathtub, and is not the target device of the present invention. In addition, it cannot be applied to a device that can detect the bath water level for the first time when the water is filled from the device through the pipe to a position above the circulation port of the bath. That is, when the water in the pipe flows out and air is contained for some reason, the water level in the bathtub cannot be detected.

[Problems to be solved by the device]

INDUSTRIAL APPLICABILITY The present invention solves the above-mentioned problems of the prior art and is applied to a device that can detect the water level of a bathtub only when the water is filled from the device through the pipe to a position above the circulation port of the bathtub. It is intended to provide an antifreezing device for a bath device, which can prevent freezing in a pipe from an appliance to a bathtub.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention connects a bathtub and a device containing a hot water heat exchanger, a bath heat exchanger, and a water supply valve via a forward pipe and a return pipe, and A circulation heating passage is provided which is connected to the return pipe and circulates water or hot water in the bathtub between the heat exchangers for bath, and a circulation pump is arranged in the circulation heating passage, and the equipment is controlled by a microcomputer. In a bath device that is equipped with a unit, and controls the hot water supply to the bathtub via the forward pipe and the return pipe by the microcomputer control unit and the circulation reheating of the water in the bathtub or the hot water by the circulation pump, Inside the device, a thermoswitch for detecting the outside air temperature, a bath water level sensor capable of detecting the bath water level when the forward pipe and the return pipe connecting the device and the bath are filled with water, and the water temperature in the bath A bath thermistor for detection is placed and the When the thermo switch detects a temperature drop, the icon control unit controls the water supply valve to open the water supply valve to supply a certain amount of water into the bathtub from the reciprocating forward and return pipes, and then the The bath water level sensor detects the bath water level, and when the bath water level cannot be detected despite the fixed amount of water being supplied, the water supply valve is controlled to supply a fixed amount of water to the bath again, and the bath water level sensor detects the bath water level. Repeating this until possible, when the bath water level sensor detects the bath water level, the water supply valve is closed to form the circulation reheating path, and the bath thermistor detects that the water temperature in the bath is below a predetermined temperature. During the operation, the circulation pump is controlled to drive the circulation pump so that the water in the bath circulates between the device and the bath via the circulation heating passage. And wherein the are.

[Action]

The device to which the present invention is applied can detect that the water level in the bathtub cannot be detected when the water level in the bathtub is equal to or lower than the circulation port, but the water level cannot be detected. The present invention utilizes this detection, and when a decrease in temperature is detected by a thermo switch, a certain amount of water is first supplied into the bathtub through the forward and return pipes of the circulation path, and the water level in the bathtub is adjusted in that state. If the water level cannot be detected, the supply of a certain amount of water and the detection of the water level by the bath water level sensor are repeated, and if it is detected that the water level of the bath is above the circulation port of the bath, The temperature of the water is detected, and when it is below the set temperature, the pump is driven to circulate the water in the bath and the equipment between the bath to prevent freezing in the equipment and in the piping.

Further, in the present invention, instead of supplying a large amount of water to the bath at once, supplying a constant amount of water and detecting the water level are repeated, so the bath water level sensor in which the water level in the bath is installed in the fixture In the bath device that can be remotely detected by the method, when there is residual water below the circulation port in the bathtub, the antifreezing action can be performed by supplying a minimum amount of water.

Further, even when the drain plug of the bathtub is pulled out, the supply of a certain amount into the bathtub and the detection of the water level are repeated, so that the same antifreezing effect as described above can be obtained.

〔Example〕

An example of an embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a flow chart showing an embodiment of the present invention, and FIGS. 2 to 4 are explanatory views of respective states showing the constitution of the instrument.

Prior to the description of the present invention, the structure of the device will be described with reference to FIGS. 2 to 4, reference numeral 1 is a heat exchanger for hot water supply, 2 is a heat exchanger for bath, and when a controller 3 gives a hot water filling instruction to the bathtub, the microcomputer controller 4 causes a water electromagnetic valve as a water supply valve. When valve 5 (the same applies below) is opened and running water is detected by this, hot water burner 6 is burned to drop hot water at the set temperature into cistern 7, and switching solenoid valves 8 and 9 are opened to circulate the forward flow to the bathtub. The bathtub is filled with water through the return pipe 11 and the return pipe 12.

In the bath apparatus to which the present invention is applied, since the water level sensor 13 is installed in the equipment installed at a position away from the bathtub, when the circulation outward pipe 11 and the return pipe 12 to the bathtub are empty, Cannot detect the water level in the bathtub, but by filling the water as described above, if the water level in the bathtub is above the circulation port, the circulation pipe is filled with water and the water level in the bathtub can be detected. When the sensor 13 detects that the water level in the bath reaches the set level, the filling of water is stopped and the switching solenoid valve 10 is opened, and the bath thermistor 14 detects the temperature of the hot water and drives the circulation pump 15 continuously. The hot water sucked from the return pipe 12 is circulated through the bath heat exchanger 2 and the outgoing pipe 11, and when the flowing water is detected by the bath flowing water switch 16, the bath burner 17 is burned to reheat the water, and the bath thermistor 14 is used. The hot water in the bathtub The reheating and detects that reached Teiyu temperature is configured to be stopped. When the controller 3 gives an instruction for reheating, the circulation reheating is performed. Since the bath pot with the hot water supply / reheating function is well known, detailed description thereof will be omitted.

In the present invention, the anti-freezing thermo switch 18
When the thermo switch 18 detects that the temperature has dropped and is turned on, the microcomputer control unit 4 controls the water solenoid valve 5 for a predetermined time (for example, 2 minutes) as shown in FIGS. 1 and 2.
Then, the switching solenoid valves 8 and 9 are opened to drive the pump 15, and a fixed amount of water is supplied into the bathtub by using the forward pipe 11 and the return pipe 12 of the circulation path to the bathtub. Next, when the water supply is completed, the switching solenoid valve 8 is opened and the switching solenoid valves 9 and 10 are closed as shown in FIGS. 1 and 3, and in this state, the bath water level sensor 13 Detect the water level. At this time,
If the water level in the bathtub is below the circulation port, the water level cannot be detected. Therefore, at that time, as shown in FIGS. 1 and 2, the switching solenoid valves 8 and 9 are opened and the switching solenoid valve 10 is closed to use the forward pipe 11 and the return pipe 12 for a predetermined time (for example, 2 minutes). Water is supplied to the bathtub, and then the water level is detected again. Thus, the water supply and the detection of the water level are repeated until the water level in the bathtub reaches above the circulation port, and when the bath water level sensor 13 detects the water level, the switching solenoid valves 8 and 9 are closed and the switching solenoid valve 10 is opened. In the state shown in the figure, the bath thermistor 14 detects the water temperature in this state, and if the water temperature is below the set temperature (for example, 15 ° C), the pump 15 is continuously driven to circulate the water in the bathtub and the equipment Then, when the water temperature exceeds the set temperature, the pump 15 is stopped.

[Effect of device]

As described above, according to the present invention, in a bath device in which the water level in the bathtub can be remotely detected by a bath water level sensor installed in the equipment, the bath device can be used regardless of the presence or absence of residual water in the bathtub. The minimum amount of water necessary for the water level in the bath to reach the circulation port of the bathtub is provided, and then the water in the bathtub can be circulated with the device to prevent freezing in the pipe from the device to the bathtub, and Even when the drain plug of the bathtub is pulled out, it is possible to perform the same antifreezing action as described above by repeatedly supplying a certain amount of water into the bathtub and detecting the water level.

[Brief description of drawings]

FIG. 1 is a flow chart of an antifreezing device according to the present invention,
FIG. 2 is an explanatory view showing a state when water is supplied to the bathtub, FIG. 3 is an explanatory view showing a state when the water level is detected, and FIG. 4 is a sectional view showing a state during circulation for freezing prevention. DESCRIPTION OF SYMBOLS 1 ... Heat exchanger for hot water supply, 2 ... Heat exchanger for bath, 3 ... Controller, 4 ... Microcomputer control part, 5 ... Water solenoid valve, 6 ... Hot water supply burner, 7 ... Sistan, 8, 9, 10 ... Switching solenoid valve , 11 ... Circulation forward pipe, 12 ... Circulation return pipe, 13 ... Water level sensor, 14 ... Bath thermistor, 15 ... Pump, 16 ... Bath running water switch, 17 ...
Bath burner, 18… Anti-freezing thermo switch.

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. A hot water exchanger, a bath heat exchanger, a device having a built-in water supply valve, and a bathtub are connected through a forward pipe and a return pipe, and the forward pipe and the return pipe are connected to each other. A circulation heating passage is provided in which water or hot water in the bath circulates between the heat exchangers for the bath, a circulation pump is arranged in the circulation heating passage, and a microcomputer control unit is mounted on the equipment. In a bath apparatus configured to control hot water supply to a bathtub via the forward pipe and the return pipe by a control unit and circulation reheating of water in the bathtub or hot water by the circulation pump, the outside temperature in the appliance. A thermo switch for detecting the water temperature, a bath water level sensor for detecting the bath water level when the forward and return pipes connecting the equipment and the bath are filled with water, and a bath thermistor for detecting the water temperature in the bath. In addition, the microcomputer control unit When the switch detects a temperature drop, the water supply valve is opened to control the water supply valve to supply a certain amount of water from the forward pipe and the return pipe into the bath, and then the bath water level sensor detects the bath water level. Performing detection, when the bath water level cannot be detected despite the constant amount of water supply, the water supply valve is controlled to supply a constant amount of water to the bathtub again, and this is repeated until the bath water level sensor can detect the bath water level. When the bath water level sensor detects the bath water level, while closing the water supply valve to form the circulation additional heating path, while the bath thermistor detects that the water temperature in the bath is below a predetermined temperature, The circulating pump is configured to drive the circulating pump so that the water in the bathtub circulates between the device and the bathtub through the circulation heating passage. Anti-freeze device in Lu apparatus.